EP 3047337 A2 20160727 - MECHANICAL OSCILLATOR FOR CLOCKWORK AND METHOD FOR MANUFACTURING THE SAME
Title (en)
MECHANICAL OSCILLATOR FOR CLOCKWORK AND METHOD FOR MANUFACTURING THE SAME
Title (de)
MECHANISCHER OSZILLATOR FÜR UHRWERK UND VERFAHREN ZUR HERSTELLUNG DAVON
Title (fr)
OSCILLATEUR MECANIQUE POUR MOUVEMENT HORLOGER ET PROCEDE DE FABRICATION CORRESPONDANT
Publication
Application
Priority
- FR 1358948 A 20130917
- EP 2014068864 W 20140904
Abstract (en)
[origin: WO2015039881A2] The present invention relates to a balance spring (42) intended for being connected to a balance (40) of a clock movement having a low thermal expansion coefficient, the balance spring (42) being made of a first composite material including first long fibres, comprising a majority of silica, embedded in a matrix made of a thermosetting polymer, wherein the composite material also includes second long fibres selected from the group comprising carbon fibres and aramid fibres, the second long fibres also being embedded in the matrix. The present invention also relates to a method for manufacturing such a balance spring (42), with optional steps for manufacturing a balance (40) that is integral with the balance spring (42).
IPC 8 full level
G04B 17/06 (2006.01); F16F 1/366 (2006.01); G04B 17/22 (2006.01)
CPC (source: EP)
F16F 1/3665 (2013.01); G04B 17/066 (2013.01); G04B 17/227 (2013.01)
Citation (search report)
See references of WO 2015039881A2
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
FR 3010804 A1 20150320; FR 3010804 B1 20151009; EP 3047337 A2 20160727; EP 3047337 B1 20180110; WO 2015039881 A2 20150326; WO 2015039881 A3 20160225
DOCDB simple family (application)
FR 1358948 A 20130917; EP 14759187 A 20140904; EP 2014068864 W 20140904